l26 NEW YORK STATE MUSEUM 



(pl.37, fig.l2) . In some species petiole of the cubitus is very short 

 (pl.27,fig.4). 



The only larva which I have found belonging to this g-enus is 

 that of adumbratus n. sp. (pl.20, figs.1-5). Pupae of the 

 above species and of P. p i n g u i s Lw. will be found described 

 upon a subsequent page (pl.19, figs.:J-4, and pl.20, figs. 4 and 5). 



KEY TO SPECIES OF PROCLADIUS 



Imagines 



a Legs uiiiform in coloi% pale or dark 



b Legs piceous or brownish; fore metatarsus about one sixth shorter 

 than the tibia ; opaque black species, thorax cinereous, black striped ; 

 crossveiu lightly cinereous ; wings white ; halteres white ; length 



4.5 mm 1. t u r p i s Zett. 



bb Legs yellow ; brown species, prothorax, a spot near its humerus and 

 scutellum dark yellow ; length 4.5 mm. (Colorado) 



2. occidentalis 

 aa Legs bicolored 



& Yellow or red dorsum of thorax (usually pale species) 

 c Scutellum and metanotum yellow, the latter sometimes with a line 

 of black 

 d Small yellowish species; thorax whitish with three shining red- 

 dish stripes ; length 1.5 to 2.25 mm 3. p u s i 1 1 u s 



(Id Larger yellow species, 3 mm 4. b e 1 1 u s 



cc Scutellum and metanotum, either one or both, with considerable 

 black upon them 

 d Tips of fore femora black ; abdomen black and fusous ; male, 



length 4.5 nun • 5. t h o r a c i c u s 



dd Fore femorji not as above 



e Fore femora wholly yellow ; abdomen yellow ; segments with 



black bases ; female, length 3 mm 6. concinnus 



ee Fore femora black and yellow 



f Femora black, bases yellow ; male abdomen black and white ; 

 female abdomen black ; male fore tibia white with black 

 tip; female fore tibia black ; length 3mm. (Cuba) 



7. h u m e r a 1 i 9 

 ff Femora and tibiae yellow, each with two black rings; abdo- 

 men black and yellow ; female, length 3.5 mm. 



8. tricolor 

 66 Black or fuscous dorsum of thorax (dark species) 

 c Femora more than half yellow 



d Abdomen wholly dark brown snbshiuing; tliorax shining brown, 

 with three shining dark brown stripes; tibiae nearly wholly 

 brown ; halteres sordidly yellow ; female, length 3.5 to 4 mm. 



9. c a 1 i g i n o s u s n. sp. 

 dd Each abdominal segment basally or apically yellow 



e Thorax i>itchy black ; pleura ferruginous ; abdomen black ; bases 

 of segments yellow ; male, 3 mm 10. flavicinctus 



