AMERICAN HEMIPTERA. 69 



3. Apex of the head rounded, tylus slightly exceeding the cheeks, humeri 



acutely spinose, basal angles of the scutellum with a large calloused 



spot (Tylospilus) acutissiniiis. 



Apex of the head truncated, cheeks as long as the tylus, outer angles rounded, 

 inner subacute (Podisus) 4. 



4. Humeri acutely spinose, directed forward ; latero-autero margins and two dis- 



cal dots of the pronotum, and the apex of the scutellum distinctly 



calloused and white iiiucronaliis. 



Humeri obtuse or acute, directed outward ; latero-anterior margins of the pro- 

 notum and apex of the scutellum not conspicuously calloused. 5. 



5. Humeri obtuse, almost rounded ; form oblong, broader posteriorly than is 



usual in this genus; venter normally with two rows of black points 



each side ; membrane without a distinct vitta placidns. 



Humeri acute or spinose ; membrane with a longitudinal dusky vitta 6. 



6. Humeri distinctly but not deeply emarginate a little before the tip...sagilta. 

 Humeri entire, acute or spinose 7. 



7. Smaller (7 to 8 mm.); humeri less acute; legs immaculate; ventral spine 



short, not reaching to the hind coxae ino<lestus. 



Longer ^8 to 10 mm.) ; humeri more acute or spinose 8. 



8. Color dark, quite strongly tinged with rufous, especially on the legs and an- 



tennae ; the femora darker toward their apex and sometimes with an 

 obscure darker subapical anuulus; median row of black spots on the 

 venter grading larger posteriorly ; ventral spine very short. 



sereiventris. 

 Color more gray or brown ; legs with two black points near the apex of the 

 femoi-a ; median row of black spots on the venter small with the pos- 

 terior one much larger; ventral spine long ill acii liven tris- 



Po(lisu$<i (Apateticus) Gilletti Uhler. Gillette and Baker's Hemiptera 

 of Colorado, p. 12, 1895. 



So far as I cau make out this insect corresponds in every partieu 

 lar with Stal's description of marginiventris (Enutn. Heniipt., 1, p. 

 49; Distant, Biologia, pi. 4, fig. 24), and I have little doubt but a 

 comparison with Stal's type would show their identity. I place this 

 species in Apateticas, although it does not altogether agree with the 

 characters given by Dallas. The posterior angles of the pronotum 

 are armed with a short and very acute spine, a character noticed by 

 Stal, but overlooked by Uhler. This species strongly resembles 

 Jalla dumosa of Europe, but may be separated at once by the un- 

 armed anterior femora. Genus Jalla has a .stout femoral tooth. 



I took two females of this rare species at Horse Tooth Gulch near 

 Ft. Collins, Colorado, in July, 1900, and Dr. TJhler's type, which I 

 have examined, came from the same locality. So far as 1 know 

 these are the only known specimens of this species, unless we add 

 Stal's type of marginiventris which was from Mexico, and another 

 mentioned by Dr. Distant. 



TKANS. AM. ENT. SOC, XXX. MAKCH, 1904. 



