1865.] 51 



tegulee, scutellum, tip of metathorax, 4 anterior legs, and extreme base of ab- 

 domen, ferruginous ; wings hyaline, iridescent. 



Male. — Black, sculptured like the preceding species, but more finely; 

 orbits, clypeus, mandibles and palpi, pale yellowish ; antennae blackish, 

 the basal joint beneath yellowish. v Thorax black ; a short line on each 

 side of the mesothorax in front, tegulae, a spot before and another be- 

 neath the anterior wing, the scutellum and the tip of the metathorax, 

 ferruginous. Wings hyaline and beautifully iridescent ; nervures and 

 stigma fuscous. Legs : the two anterio pairs, with their cox;», ferru- 

 ginous, tinged with yellowish in front; posterior pair fuscous, tips of 

 their coxae ferruginous. Abdomen blackish-fuscous, the middle seg- 

 ments somewhat paler; basal half of the 1st segment yellow. Length 

 3 lines ; expanse of wings 4 lines. 



Collection. — Dr. J. Gundlach. One specimen. 



This may be a dark % variety of T. fuscatus. 



Genus CREMASTUS, Grav. 

 Cremastus luctuosus, n. sp. 



Black ; mouth, tegulfe and four anterior legs, white; apex of abdomen slightly 

 stained with ferruginous : wings hyaline, iridescent. 



Male. — Black, clothed with a thin, appressed, very fine, whitish pu- 

 bescence, more obvious on the face, where it is somewhat silvery ; most 

 of mandibles and the palpi, white ; antennae more than half the length 

 of the body, blackish. Thorax very minutely punctured, the mesotho- 

 rax opaque and glabrous; pleura slightly shining, with a striated space 

 beneath the anterior wings ; tegulae white ; scutellum rather large, flat- 

 tened and pubescent; metathorax pubescent, the elevated lines distinct, 

 enclosing on each side of the middle a large, irregular space, leaving a 

 long, narrow, depressed space on the disk. Wings hyaline, with a 

 purple iridescence ; nervures and stigma black. Legs : the two ante- 

 rior pairs, with their coxae, white ; the middle femora beneath, except 

 at base, black ; posterior legs black, the extreme base and apex of their 

 femora whitish. Abdomen elongate, slender, black; beyond the 2nd 

 segment, gradually broader and much compressed; apical third of the 

 4th and the ventral segments, pale ferruginous. Length 4 lines; ex- 

 panse of wings M lines. 



Collection. — Dr. J. Gundlach. One specimen. 



This species makes an oval cocoon, 2 \ lines long and \\ broad, of a 

 dirty white color, with a narrow, tolerably regular, median, black band, 

 and a spot on each end near which there is a row of large irregular 

 spots, sometimes confluent, also black. 



