276 [April 



more or less testaceous in front. Abdomen deep black, smooth and 

 polished, shaped as in the preceding species. Length 6 — 11 lines; 

 expanse of wings 11 — 111 lines. 



Five specimens. Easily recognized by the deep yellow wings, broadly 

 margined at tip with fuliginous. 



3. Exetastes cseruleus, n. sp. 



Deep blue, polished; antenna; black ; wings fuscous; legs pale rufous. 

 Female. — Brilliant deep blue, with a violet shade in certain lights, 

 smooth and polished ; head and thorax delicately punctured ; antennae 

 nearly as long as the body, slender, black; mesothorax and scutellum 

 rather conspicuously tinged with purple, more distinctly punctured 

 than the head; metathorax densely punctured, smooth about the base 

 above, the dorsal middle has a slight longitudinal prominence, which 

 is faintly sulcate ; tegulae black. Wings deep fusco-hyaline. darker 

 along the nervures, with a rather strong metallic and iridescent reflec- 

 tion ; nervures black; areolet as usual Legs elongate, pale rufous ; 

 the coxte and trochanters blue ; extreme tips of posterior tibiae and 

 basal joint of their tarsi, blackish. Abdomen suhfalcate, broad and 

 compressed at tip, brilliant deep blue with a slight violet reflection, 

 smooth and highly polished ; ovipositor very short, pale rufous. Length 

 5j lines; expanse of wings 82 lines. 



One specimen. A very handsome species, with the colors remark- 

 ably brilliant. 



4. Exetastes abdominalis, n. sp. 



Blue black; abdomen rufous; wings fusco-hyaline. 



Female. — Slender, blue-black, polished, delicately punctured; an- 

 tennae more than half the length of the body, slender, black or piceous- 

 black ; metathorax finely rugose. Wings fusco-hyaline, sometimes fuli- 

 ginous with a strong violaceous reflection ; nervures black ; areolet as 

 usual. Legs long, black, sometimes more or less tinged with piceous, 

 the two anterior pairs in front, and the apical joints of the posterior 

 tarsi more or less, tinged with testaceous ; posterior coxae very robust, 

 subglobose, sometimes tinged with rufous at base beneath. Abdomen 

 long and rather slender, pale rufous, sometimes bright saffron-yellow, 

 smooth and polished, the basal half depressed, the apical half broad 

 and subcompressed ; the basal segment with a stout tubercle on each 

 side before the middle, the extreme base often blackish; ovipositor 

 short, pale rufous, valves black, whitish within ; venter more or less 

 stained with yellowish, especially at base. Length 5 \ — 7 lines ; ex- 

 panse of wings 9 — 10 lines. 

 Six specimens. 



