Rutelini, MacLeay, 1819

Jameson, Mary Liz & Morón, Miguel Angel, 2001, Descriptions Of The Larvae Of Chlorota Cincticollis Blanchard And Chasmodia Collaris (Blanchard) (Scarabaeidae: Rutelinae: Rutelini) With A Key To The Larvae Of The American Genera Of Rutelini, The Coleopterists Bulletin 55 (3), pp. 385-396 : 387-388

Key to the American Genera of Rutelini Based on Third­Instar Larvae (Modified from Jameson 1999)

1 Left mandible with 2 teeth in scissorial region (including sharp tip) --- 4

1' Left mandible with 3 well­defined teeth in scissorial region -------------------- 2

2 Lacinia of maxilla with 1 uncus (well­developed or reduced) --------------- 12

2' Lacinia of maxilla with 2 or 3 unci ------------------------------------------------------------------- 3

3 Lacinia of maxilla with 2 unci (subequal or 1 reduced and represented by a short, stout seta) ----------------------------------------------------------------------------------------------------- 9

3' Lacinia of maxilla with 3 unci, subequal. ------------------------ Platyrutela Bates

4 Epipharynx with plegmata well developed. Septula present --------------------- 5

4' Epipharynx without plegmata. Septula absent ------------------------------------------------ 6

5 Septula short, ovate. Lacinia of maxilla with 2 unci, subequal. Maximum width of cranium 3.6 mm -------------------------------------------------- Calomacrapis Bates

5' Septula elongate, extended across venter of last segment and lower anal lip. Lacinia of maxilla with 1 reduced uncus. Maximum width of cranium 4.9 mm ----------------------------------------------------------------------------------- Parastasia Westwood

6 Abdominal spiracles 1–6 subequal to abdominal spiracles 7–8 -------------- 7

6' Abdominal spiracles 1–6 smaller or larger than abdominal spiracles 7–8 -------------------------------------------------------------------------------------------------------------------------------------------- 8

7 Stridulatory area of mandibles with approximately 7 stridulatory ridges in basal two­thirds ------------------------------------------------------------------------- Rutela Latreille

7' Stridulatory area of mandibles with approximately 20 stridulatory ridges in basal two­thirds -------------------------------------------------------------------- Microrutela Bates

8 Spiracles of abdominal segments VII and VIII noticeably larger than preceding spiracles. Maximum width of cranium 5.8 mm. ---------------------------------- ------------------------------------------------------------------------------------------------------------------------------- Paracotalpa Ohaus

8' Spiracles of abdominal segments VI, VII, and VIII noticeably smaller than preceding spiracles. Maximum width of cranium 6.9 mm ---------------------------- ------------------------------------------------------------------------------------------------------------------------------ Cotalpa Burmeister

9 Septula irregularly defined on lower anal lip. Lacinia with apical uncus well developed; basal uncus reduced, truncate, and with a short, stout seta ---------------------------------------------------------------------------------------------------------------- Rutelisca Bates

9' Septula absent. Lacinia with unci subequal; basal uncus not reduced, not truncate, and without a short, stout seta --------------------------------------------------------- 10

10 Epipharynx with epizygum. Spiracles of abdominal segments VII and VIII similar in size to preceding spiracles. Maximum width of cranium variable ------------------------------------------------------------------------------------------------------------------------ 11

10' Epipharynx without epizygum. Spiracles of abdominal segments VII and VIII noticeably larger than preceding spiracles. Maximum width of cranium 7.0 mm ---------------------------------------------------------------------------- Pelidnota Macleay

11 Last antennal segment with 7–13 dorsal sensory spots. Maximum width of cranium 10.0 mm --------------------------------------------------------------------- Chrysina Kirby

11' Last antennal segment with 2–5 dorsal sensory spots. Maximum width of cranium 6.0– 7.2 mm. --------------------------------------------------------- Plusiotis Burmeister

12 Clithra of epipharynx present, symmetrical. ----------------------- Cnemida Kirby

12' Clithra of epipharynx absent ------------------------------------------------------------------------------- 13

13 Last antennal segment with 4–6 dorsal sensory spots ------------------------------ 17

13' Last antennal segment with 2 dorsal sensory spots ----------------------------------- 14

14 Lobes of respiratory plate separated ---------------------------------------------------------------- 15

14' Lobes of respiratory plate contiguous ------------------------------------------------------------- 16

15 Maxillary stridulatory area with row of 6 teeth. Pro­ and mesotarsal claws with 2–5 long, stout setae ------------------------------------------------ Macropoides Guérin

15' Maxillary stridulatory area with row of 8–9 teeth. Pro­ and mesotarsal claws with a rounded, apical process and 1 externobasal seta and 1 anterior preapical seta. -------------------------------------------------- Paraheterosternus Morón

16 Metathoracic tarsal claws reduced relative to pro­ and mesothoracic claws. Spiracles of abdominal segments I­VIII progressively smaller. Head capsule dark reddish­brown. Maximum width of cranium 9.0 mm ---------------- ------------------------------------------------------------------------------------------------------------------------- Heterosternus Dupont

16' Metathoracic tarsal claws not reduced relative to pro­ and mesothoracic claws. Spiracles of abdominal segments I­V progressively smaller and segments VI­VIII progressively larger. Head capsule bicolored, dark brown to reddish­yellow. Maximum width of cranium 5.0 mm --------------- ---------------------------------------------------------------------------------------------------------------------------------------- Parisolea Bates

17 Metathoracic tarsal claws reduced and weakly sclerotized relative to pro­ and mesothoracic claws ------------------------------------------------------- Macrapsis Macleay

17' Metathoracic tarsal claws subequal and similarly sclerotized relative to pro­ and mesothoracic claws ------------------------------------------------------------------------------- 18

18 Head with 1 lateral ocellus ---------------------------------------------- Chasmodia Macleay

18' Head lacking lateral ocellus --------------------------------------------- Chlorota Burmeister