ART. 2 BEETLE LARVAE OF GALEEUCIXAE BOVING 9 



4. Most sclerites on the upper surface of the body prolonged into senti' 11. 



Sclorites not developed as senti 5. 



5. Abdominal spiracles lodged in a large sclerite 6. 



Abdominal spiracles either free or boi'dered by a narrow vinsr 7. 



6. Abdominal dorsal sclerites of moderate size, their setae distinct. Scuto- 



scutellum with interior and exterior sclerites separate. Mandible with- 

 out penicillus. Maxillary palpus with four joints as normal In 

 Galerucinae. 



Trirhabda (T. canadensis Kirby, p. 12, fig. 3; T. virgata LeConte, p. 14; 

 T. brevicollis LeConte, p. 15; T. nitidicollis I.,eConte, p. 15; T. 

 tomentosa Linnaeus, p. 15; T. attenuata Say, p. 15). 

 Abdominal dorsal sclerites large, covering the back almost completely, 

 setae minute or absent. Scuto-scutellum with interior and exterior scle- 

 rites fused. Mandible with penicillus. Maxillary palpu.s three-.1ointed. 

 Galerucella, Group A (G. nymphaeae Linnaeus, p. 16, fig. 18; G. lineola 

 Fabricius, from Europe, p. IS ; G. sagittarlae Gyllenhal, from Europe, 

 p. 18). 



7. Parascutal area of abdominal segments with anterior sclerite developed — 8 

 Parascutal area without the anterior sclerite 10. 



8. Several setae present on most of the dorsal sclerites of the abdomen (body 



with longitudinal black and yellow bands alternating) Galerucella, 



Group B (G. luteola Miiller, p.lD, figs. 4, 21; G. species, p. 21). 

 Not more than two (exceptionally three) setae on any single dorsal sclerite 

 or on each side of any compound median sclerite 9. 



9. Pcuto-scutellum of abdomen with exterior sclerite distinct Galerucella, 



Group C. (G. viburni Paykxdl. European species, p. 21. fig. 23). 

 Scuto-scutellum of abdomen with exterior and interior sclerites fused into 



a single median compound sclerite Galerucella, Group D. 



(G. cavicollis LeCont"" ; G. kalmiae Fall ; G. decora Say ; G. perplexa 

 Fall; G. vaccinii Fall; G. spiraeae Fall, fig. 22; G. alni Fall.)^ 

 10. Dors.",l sclerites of abdomen carrying a number of setae varying from one 

 or two on some sclerites, to three or four on others. (Mandible with 

 five teeth and inner margin behind the teeth blade shaped and obtusely 



rounded anteriorly) Galerucella, Group E. 



(G. notata Fabricius, p. 23, figs. 24. 29; G. cribrata LeConte, p. 26) ; and 

 Monoxia puncticollis (Say) (p. 26, figs. 7, 50.)^ 

 Dorsal sclerites of abdomen on each side with one long seta on each 



sclerite Lochmaea 



(L. capreae Linnaeus, first stage larva, from Europe, p. 29, fig. 6). 



« " Sentus " has recently been defined as a more or less slend"r, unbrancherl chitinous 

 process of the body, from which well-developed setae radiate. 



'' The species hero listed as having larvae belonging to " Galerucella type D " are 

 treated in the very valuable paper. The Blueberry Leaf Beetle and Some of Its Relatives, 

 by H. C. Fall and W. C. Woods (Maine Agric. Exp. Sta., Orono, Bull. 319, 1924). Doctor 

 Woods has given descriptions and diagrams of the arrangement and form of the sclerites 

 and the distribution of the setae in the larvae of all the species meiitioued of group D, 

 Oalerucella cavicollis excepted, but according to Mr. Fall's remarks (p. 87) that 

 Galerucella kalmiae is " extremely similar to cavicollis, from which * * * it is 

 scarcely distinguishable," one may expect to find the sclerites and setae of the cavicollia 

 larvae arranged as shovv.'i in Docior Wood's diagram of the k<ilmiae larva. No larva of 

 G. cavicollis is preserved in the National Museum. 



* The larva of Monoa>ia puncticollis does not represent a distinct generic type. It 

 belongs to the Oalerucella group E, and is separated from the two species of this type 

 mainly by the smaller size of its setae (figs. .30 and 47) and dark colored skin with light 

 sclerites, whereas the two Galerucella species normally are light colored with large, dark 

 setal cups. 



22483—29— 2 



