164 A finals Entomological Society of A merica [Vol .11, 



If Loew's names were used this species would come in Antiphrisson 

 without any question. The form and color taken in connection with 

 the male genitalia which are figured in the plate, and the absence of 

 bristles before the margins of the abdominal segments make the species 

 rather easy of determination. 



Asilus californicus n. sp. (Fig. 36). 



Dark colored species, wings clear hyaline, legs mostly yellow, pre- 

 apical bristles of the abdominal segments light colored, upper forceps 

 of the male genitalia split at the apex. Length 21 millimeters. 



Face and front of usual width, facial gibbosity prominent, mystax 

 with a row of rather fine black bristles around the outside, remainder 

 composed of coarser white bristles ; palpi black with light hair ; antenna 

 black, third segment about as long as the first two together, arista not 

 quite as long as its segment ; bristles and hairs of the occiput light with 

 the exception of a few rather strong bristles just back of the upper 

 part of each eye. Thorax dark gray, mid-dorsal stripe black but di- 

 vided by a distinct gray interval. Wings clear hyaline and wider 

 than usual ; front femur black on the anterior side for the basal half 

 of its length, otherwise yellow; tibia yellow, narrowly black at the 

 apex; metatarsus yellow, other tarsal segments black; middle leg like 

 the anterior with the addition or black at the tip of the anterior side 

 of the femur; posterior leg the same as the middle one except that the 

 black of the femur takes the form of a stripe not reaching either end. 

 Abdomen dark gray, posterior margin of each segment only slightly 

 lighter and preceded by a prominent row of yellow bristles. Male 

 genitalia shining black with numerous long black bristly hairs especially 

 beneath ; upper forceps rather long, of nearly the same width through- 

 out, apex split with the lower division the longer and curved inward. 



A male of this distinct species from Cisco, California, altitude 5,000 

 feet, taken in June, 1901, and received from Charles W. Johnson. 



Asilus sericeus Say. 



A large brown species with brown wings and pale brown legs. 

 Length 20-28 millimeters. 



Facial gibbosity with the most prominent point on a level with the 

 lower edge of the eye, mystax composed entirely of yellow bristles, 

 palpi black with black hairs, first and second segments of the antennae 

 yellow, third segment black and decidedly longer than the first two 

 together, arista about one fourth as long as its segment; bristles and 

 hairs of the occiput all yellow. Thorax clothed with bright yellow 

 dust, mid-dorsal stripe dark brown, reaching the scutellum in its full 

 width; wings brown, veins margined with paler; legs pale brown, each 

 femur usuallv with a dark marking on the anterior side. Abdomen 

 colored like the thorax, no bristles before the incisures. 



Generally distributed over the eastern part of North America 

 from Canada to Texas and at least as far west as Kansas, 



