268 Annals Entomological Society of America [Vol. XI, 



to apex of jugum; also a short, pale fuscous \-itta caudo-ventrad of each 

 eye. (One specimen in addition shows a small fuscous spot behind the 

 ocelli). Antenna? fuscous, first, second and third segments black toward 

 apex; fourth segment more than one-third longer than two preceding 

 together, first shorter than second, subequal to third, and attaining 

 apex of head. Rostrum piceous, paler at incisions, first segment longest, 

 slighth' longer than second and subequal to two apical ones together; 

 fourth one-half longer than third. 



Pronotum densely punctate, black, mottled with fuscous on posterior 

 half of the disc and on the sides, sometimes with an indication of short 

 mcdiodorsal and lateral marginal fulvous lines near anterior margin. 

 Scutellum black, fiavescent at tip. Corium castaneous, mottled with 

 fiavescent; membrane infuscatc. Thorax and abdomen black beneath, 

 densely hairy, sides of thorax mgose and deeply punctate. Scent gland 

 orifices well developed. Margins of abdomen minutely fiavo-maculate. 

 Legs with the coxae, trochanters, and tibife castaneous, the latter black 

 at tip; femora black, armed with three or four long spines. Claspers 

 of the male with mesal margins subparallel, caudal surfaces slightly 

 expanded laterally near tip. (Fig. 3). 



Size cf,!') X l2.() mm. 



Holotype: cf, from Ft. Collins, Colorado. 

 Paratype: cf. from La Animas, Colorado; both in the Ball 

 collection. 



This western form might easily be mistaken for eurinus. 

 The male genitalia are somewhat similar to those of pluto, from 

 which, however, the species is distinguished by the length of the 

 last antennal segment, the brownish mottling of the pronotum, 

 the fuscous corium, the smaller size, and the dense covering of 

 long, soft, pale hairs which give the insect a greyish cast. 

 It is possible that Heidemann had it in mind when he stated 

 (1902) that A. pinto is ''very hairy." None of the specimens 

 of pluto at hand are as hairy as eurinus and Uhler's description 

 does not indicate such a condition, his only reference to setae 

 being the statements that the head is pubescent, the pronotum 

 ' ' a little pubescent ' ' and with bald callosities, and venter, 

 "pubescent at tip." The species here described is more 

 densely hairy than any other Alydiis and the second and third 

 antennal segments are relatively much shorter. The types 

 are from Colorado, where they were collected at comparatively 

 low^ altitudes. 



