4(1 akuhenid.t;. 



of till' sot'ond, luid imidx narrower towards the marginal. Aduumen 

 potiolato in both sexes, in the males clavate. 



Of this f,'enns throe species are at present l<n()wn, hut (he female 

 of the Mexican one only is described ; the form of the palpi separates 

 them from tlie <;tMiera previously estaldished ; the maxillary palpi 

 are remarkable in having three stout joints and three slender ones. 

 In the neuration of the wings they agree with many other Jhdicti; 

 bnt the clavate form of the abdomen at once distinguishes them. 



1 . Cacosoina discolor. 



Femult. Length 4 lines. — Black, with tints of green on the thorax, 

 and with the basal segment of the abdomen rufo-piceous. Head 

 with a thin hoary pile on the face ; opaque, Mith the elypeus shining 

 and having a few scattered punctures ; the apex of the flagellura 

 of the autenntv; fulvous. Thorax opacpie, with the collar produced 

 laterally into an acute angular projection, which is bright green ; 

 the posterior margin of the mesothorax narrowly, and the base of 

 the metathorax bright metallic green, the latter with fine divergent 

 stria> ; the wings hyaline, iridescent, and with the anterior margin 

 of the fore wings bordered with fuscous ; legs rufo-piceous, their 

 pubescence pale and glittering. Abdomen opaque and subpetiolate ; 

 the basal segment with a black band in the middle, and the pos- 

 terior margin narrOAvly black ; the basal margin of the third seg- 

 ment narrowly green ; the margins of the segments beneath fringed 

 with pale pubescence. 



Male. Length 4 lines. — More slender than the female. The sides 

 of the face and the clypcus green ; antennai fulvous, slightly fus- 

 cous above. Thorax, legs, and wings as in the female, the fuscous 

 border of the latter commencing in the marginal cell. Abdomen 

 with the two basal segments rufo-testaceous ; the basal margin of 

 the third slightly green. 



Hah. Mexico, Oajaca.^ 



2. Cacosoma abdominale. 



Male. Length 4| lines. — Head and thorax brassy green, abdomen 

 feiTuginous. The face with pale fiilvous pubescence ; the elypeus 

 produced ; the flagellum of the antenna; fulvous beneath, above 

 fuscous, the joints subarcuate. The mesothorax of a brassy green ; 

 the metathorax dark green, and nigose at the base ; the pubes- 

 cence pale fulvous ; wings hyaline and iridescent, the nervures 

 pale ferruginous ; the tips of the femora, the tibiaj, and tarsi pale 

 fcrniginous. Abdomen smooth, shining, and ferruginous. 



Hah. Chili. 



3. Cacosoma agile. 



Male. Length 4^ lines. — Head and thorax green ; abdomen pitchy 



