i3» 



370. HAi.icrus cRAssicORNis A7>/'>'. -Length of body 3 lines. A 

 single specimen taken in Lat. 54"". 



[268 ] ^ . — This little insect is so extremely like Halicius /cti'is, that 

 at first ' . egarded it merely as a variety of that species, but upon a closer 

 inspection they appear to rne distinct. In //. ^rassicornis the antennae 

 are proportionally more robust, but the ])rincii)al difference lies in the 

 sculpture of the thorax. In H. /iptIs that ])art is visibly punctured with 

 scattered punctures, but in the insect ! am describing, under a common 

 lens, the punctures are scarcely discernible, but under a higher power, 

 besides a slight channel drawn longitudinally, innumerable very minute 

 punctures appear. In the former also the stigma of the upper wings is 

 piceous, while in the latter it is testaceous. In other respects they arc- 

 perfectly similar. 



371. Andrena IMFINCTA Kirby. — Length of body 5I.J Imes. A 

 single specimen taken in the Journey from New \'ork to C'umberkmd- 

 house. 



% . — Body black, clotbcd with rather long whitish hairs, especially the 

 face below the antennae ; hairs of the thorax rufescent ; wings subhyaline 

 a little darker at the tip ; nervures testaceous, post-costal black ; brush 

 of the posterior tibia white ; abdomen impuneiured with the hairs of its 

 anterior half white ; the other hairs above and below black. 



372. Andrena varians Ros^. Length of body 5 V^' lines. Three 

 specimens taken, locality not stated. 



[269.] ^ . — Very like the species just described. but the head is clothed 

 with black hair ; that of the thorax and base of the abdomen is tawny red ; 

 the brush of the posterior tibia is changeable, as the site varies, from black 

 to white ; the hairs of the under side of the body and of the last 

 abdominal segment above are black, ex( ept those on tlie posterior thighs 

 forming the flocculus, which are whitish, as are those of the anterior part 

 of the abdomen. 



KAMILY NO.VIAUIDA:. 



373. NoMADA AMERit ANA Kirbx. - Plate vi.. fig. 3. — Length of body 

 4j^ lines. A single specimen taken in Lai. 65'. 



Body dark-ferruginous. Thorax with a longitudinal mesa! black line, 

 less distinct on the metathorax ; breast with a black spot on each side : 



