June, ic,o8j Rohwer : New Western Tenthredinid.*. 103 



Eupithecia cocoata, new species. 



Expanse 22 mm. Palpi long, rough, scaled. Antenna; flattened, rather stout, 

 ciliate. Head and entire upper surface of body and wings a uniform chocolate- 

 brown, the costa barred with paler streaks, which are beginnings of narrow, pale, in- 

 definite, wared lines across fore wings. The most prominent of these are from a twin 

 spot, turning outward and enclosing discal dot, and running thence in a broad wave 

 straight to inner margin. The pale line usually succeeding extradiscal is also pres- 

 ent, geminate across costa, then coalescing and becoming indistinct, curved strongly 

 outward at costa, not angled ; inclined basally with a large curve between veins one and 

 two, it reaches inner margin three fourths out. The white line usually traversing sub- 

 terminal space is absent, showing only in a cluster of pale scales at anal angle. Dis- 

 cal dots moderately large, oval, jet black,"outwardly bordered with a few white scales. 

 Fringes on all wings same color as upper surface, slightly darkened opposite veins. 

 Terminal line dark chocolate-brown, interrupted between veins. Hind wings show- 

 ing continuance of pale line succeeding extradiscal, otherwise unmarked except 

 along inner margin, where they are shortly barred with dark brown, and at anal 

 angle, where scattering dark brown scales are contiguous to a conspicuous white 

 lunate spot. Discal dots round, small, dark brown. Beneath whitish, thickly 

 sprinkled with brown scales, showing a discal, extradiscal and broad subterminal 

 shade lines, in darker tints, all heavier at costa. The pale lines as indicated above, 

 also clearer white. The hind wings basally are crossed with narrow waved pale 

 lines, and the subterminal shade line is blackened at anal angle. Discal dots as 

 above, but all dark brown. Abdomen beneath with white scales. Fore legs dark 

 brown, the tarsi banded with paler. Middle and hind legs whitish. 



Type. — One 8 in U. S. Nat. Museum, taken at Plummer's 

 Island, Maryland, probably in June. 



This species differs from meritata Pear, in color, in the absence of 

 black lines or veinings, in its stouter, more heavily ciliate antennae 

 and longer palpi. 



NEW WESTERN TENTHREDINIDiE. * 



By S. A. Rohwer, 

 Boulder, Coi.o. 



1. Bactroceros pugnax, new species. 



Female. — Length 9.5 mm.; length of anterior wing 8 mm. Robust. Head 

 almost as wide as thorax, polished, without punctures ; face not very strongly mar- 

 gined and not as perpendicular as in Bactroceros luteicornis Nort. ; posterior angles 

 of head rounded ; clypeus rounded at sides, rather truncate across middle ; middle 

 carina extending on basal half of clypeus; middle carina divides above antennae 



*The writer wishes to express his thanks to Prof. C. P. Gillette and Mr. H. S. 

 Smith for the loan of material and to Prof. T. D. A. Cockerell for many favors. 

 Unless otherwise stated, the types are in the author's collection. 



