318 Mr. T. D. A. Cockerell — Descriptions and 



middle of mesothorax slightly greenish ; metathorax very 

 dar,k green or greenish black ; mesothorax and scutellum 

 densely granular-punctate^ almost rugose ; anterior corners 

 of prothorax not at all prominent ; area of metathorax poorly 

 defined, coarsely rugose-wrinkled at base and middle ; pos- 

 terior truncation quadrate, sharply defined only below, over- 

 lapped at apex by the golden-tinted tip of basal area ; tegulte 

 rufo-fuscous, with pallid margins and a bluish spot. Wings 

 ample, somewhat dusky, conspicuously so at apex ; nervures 

 and stigma ferruginous; second s m. large ; first r. n. joining 

 second t.-c. Legs with pale hair, orange-tinted on inner side 

 of tarsi ; femora and tibiae mainly metallic blue, hind tibia3 

 black behind ; tarsi more or less ferruginous, especially the 

 hind ones. Abdomen closely and finely punctured but shining, 

 golden green, the disc of first segment and base and sides 

 of second faintly flushed with coppery ; hind margins of 

 segments suffusedly and rather obscurely blackish ; venter 

 of abdomen formed as in Augochlora amatitlana ; anteunse 

 long and black. 



Hab. Amatitlan, Guatemala, Feb. 5, 1912 [W. P. 

 Cockerell) . 



This certainly must be quite closely related to Augochlora 

 amatitlana, hax'mg essentially the same structure and general 

 type of coloration. In detail, how^ever, A. amatitlana is very 

 differently coloured. The eyes of A. amatitlana are practi- 

 cally hairless, but with the compound microscope I find a 

 very few short hairs. It is a question whether A. amatitlana 

 should not stand as Canohalictus amatitlanus ; but^ on the 

 other hand, it is possible that actual comparison with the 

 type of Ccenohalictus (from Ecuador) would show that 

 neither of the insects now described should really be referred 

 to it. Certainly they have not the long hair of the eyes of 

 C, trichiophthalmus , Cameron. If, however, we redefined 

 Ccenohalictus as Augochlora of the sericei group with hair 

 on the eyes, we have four species : C. tricldophthalmuSj Cam.; 

 C. chatops, Vachal ; C, amatitlanus, Ckll. ; C. ivilmattce, 

 Ckll. The species of Vachal and Cameron are considerably 

 smaller than those from Guatemala, being only about 8 mm. 

 long, 



Dialictus onustulus, sp. n. 



? , — Length fully 5^ mm. 



Head and thorax olive-green ; clypeus smooth with sparse 

 large punctures, the lower half black, the upper half crimson 

 and green ; supraclypeal area tiuged with brassy ; mandibles 

 red at apex ; front dull and densely granular ; antennae 



n 



