174 ENTOMOLOGICAL SOCIETY 



; 



Two are from the United States, a third is from Baja California, 

 and was formerly considered JB. peregrinus, but is very distinct 

 from that species. The following table will separate these allied 

 forms : 



1. Superior appendages very long and slender, more than one-half the 



length of last abdominal segment 2 



Superior appendages much shorter, scarcely as long or shorter than 

 one-half the last abdominal segment 4 



2. Superior appendages as long as last abdominal segment, yellowish, 



apical abdominal segments without pale marks B. carrizonus. 



Superior appendages shorter than the segment, often blackish 3 



3. Superior appendages plainly shorter than last abdominal segment; api 



cal abdominal segments without pale marks B. assimilis. 



Superior appendages nearly as long as segment, black, abdomen spotted 

 with pale throughout B. dtsstmtlis. 



4. Cubitus heavily marked with black ; pronotal stripes connected in front ; 



femora black above; superior appendages black B. ferox. 



Cubitus not heavily marked with black; thoracic stripes not connected 

 in front; smaller species 5 



5. Femora thickly dotted with black; superior appendages blackish; ver 



tex not with four dots B. texanus. 



Femora wholly pale ; superior appendages yellowish ; vertex with four 

 black dots B. 4-punctatns. 



Brachynemurus assimilis, n. sp. 



Face yellow, a transverse black spot from eye to eye, including bases 

 of antennae, and limited above by a curved black band, the lower margin 

 pointed in the middle; vertex pale, with a brown band, interrupted in the 

 middle and not reaching the eyes. Prothorax yellowish, with four black 

 stripes at subequal distances apart and all reaching anterior margin, the 

 pair each side sometimes connected in front; lower margin with black 

 stripe. Palpi tipped with black; antennae brown, quite long. Rest of 

 thorax lineate and maculate with black, two stripes on meso- and metascu- 

 tellum. Legs pale, more or less heavily spotted with black, the tips of the 

 tibiae and tarsi black. Abdomen pale at base, lineate with black, beyond 

 middle black. Wings hyaline, venation interrupted black and white; 

 pterostigma pale, with a basal brown spot; the cubitus quite heavily 

 marked with brown (but not so much as in B. ferox}. The abdomen of 

 the male is very long, longer than in allied species, the superior appen 

 dages very long and slender, about as long as in B. carrizonus, but the 

 last abdominal segment is very much longer than the appendages. 



Length rj 1 , 57 mm. ; 9 > 34 mm. 



Four specimens from Tehama, California, August (Morse), 

 and from Oregon. Closely allied to B. carrizonus, but differs 



