152 first Annual Beport 
which pass part way down the face. Four basal joints of the anten- 
ne with long dark bristle-like hairs. Last joint of antenne slender 
and twice as long as any other joint. Two longitudinal narrow yel- 
low stripes on the thorax do not quite reach the scutellum. Halteres 
lemon yellow. This fly is much darker than EL. bellus or E. ornatus. 
Thorax above the wing with a small yellow patch, and a round yellow 
patch on the lower corner of each abdominal segment as seen from 
above. Last segment with base only black, the remainder yellow. 
Ventrally the first segment of the abdomen is black, the rest sordid 
yellow. Thorax black ventrally; there is a lateral narrow yellow 
stripe running from the base of the wing, the length of the thorax. 
Occiput convex and black. Mouth parts yellow. Most of the sub- 
costal, and the end of the costal cell, is brown, the rest of the wing 
hyaline. Length 5.5 mm.; length of wing 5 mm. 
A single specimen collected by Prof. Baker at Laguna Beach. 
BOMBYLIDAE 
Toxophora pellucida Coq. 
Several specimens. 
THEREVIDAE 
Psilocephala costalis Lw. 
Psilocephala laevigata Lw. 
Psilocephala marcida Coq. 
The above three flies were taken in vegetation just back from the 
beach. 
ASILIDAE 
Mallophora fautrix O. S. 
Not uncommon. This species was described from Mexico. 
Stichopogon trifasciatus Say. 
(Figure 87) 
This Asilid is widely distributed in the United States. At Laguna 
it was common on the beach sand. It is a silver gray fly, with black 
markings, and its colors blend with the sand perfectly. This pro- 
tective coloration makes it very hard to locate when at rest. In 
habits it is a typical robber-fly. Determined by Prof. Hine. 
EMPIDIDAE 
Drapetis nitida Melander 
This fly was very common on the beach sand. It is quite small 
and jet black, and runs rapidly here and there over the sand, seldom 
flying to any distance. It is also found on the edge of the lagoon 
and is very quick and hard to catch. 
