122 THE UNIVERSITY SCIENCE BULLETIN. 



KEY TO GENERA. 



A. Last antennal segment longest. 



B. Ocelli in contact with inner margin of the eyes. 



Macrovelia. 

 BB. Ocelli absent. Microvelia. 



AA. First antennal segment longest. 



B. Third segment of middle tarsus split and with feathery hairs 

 set in the silt. Rhagovelia. 



BB. Intermediate tarsi not split. Velia. 



Genus MICROVELIA Westw. 1834. 



Westwood, Ann. Soc. Ent. Fr., Ill, p. 647. 



"All the members of this genus are small, compact bugs. Both winged 

 and wingless forms occur. The legs are rather short and stout. The 

 fore tarsi are 2-segmented, the two hind pairs 1-segmented. The eyes 

 are hemispherical, placed next to the pronotum. Ocelli are absent. The 

 hemelytra when present are as long as the abdomen, and have six con- 

 secutive areoles, of which the basal are smaller than the others, while 

 the apical ones emit two nerves." — Uhler. 



Eight species listed for our range. Two of these are described in a 

 periodical not available to the writer. A key for 6 species is possible. 

 Bueno gives us a key to five species. (See Bulletin Brook. Ent. Soc, XI, 

 p. 52.) Bueno has promised a monograph on this genus. 



BUENO'S KEY TO THE EASTERN MICROVELIA. 



In Bull. Brookl. Ent. Soc. 



The species M. signata Uhl., M. marginata Uhl., and M. rohusta 

 were not placed in the key because they were not in the range treated. 



A. Antennae comparatively short and stout, not exceeding length of 

 head and thorax taken together; legs short and stout. 



M. atrato Bueno. 

 AA. Antennae slender of varying lengths. 



B. Posterior tibiae curved in male, straight in female; antennae 

 short, not as long as head and thorax taken together; apterous 

 male, long, slender, fusiform, female, short, broad, nearly 

 orbiculate. M. borealis Bueno. 



BB. Posterior tibiae straight in both sexes. 

 C. Posterior tarsi 3-segmented. 



D. Antennal segment 3 longer than 1, 4 subequal to 

 2 and 3 taken together; segments 3 and 4 slender, 

 equally stout and of the same diameter through- 

 out, 4 tapering at the end, antennae very long; 

 hemelytra much marked with white. 



M. albonotata Champ. 

 DD. Antennal segment 3 subequal to 1, 4 shorter than 

 . 2 and 3 taken together, stouter than 3, fusiform: 

 apterous form with dorsal patches of blue gray 

 pile. M. fonthialis Bueno. 



CC. Posterior tarsi 2-segmented; antennal segments 1 and 3 

 subequal, 4 much shorter than 2 and 3 taken together; 

 apterous form with dorsal patches of silvery white pile; 

 winged form with unicolorous hemelytra. 



M. americana Uhl. 



