E. T. CKKSSOX, JR. 



6. Thorax rufous • "• 



Thorax black or bluish ; wings distinctly handed 8. 



7. Wings with two distinct brownish cross-hands and an apical spot; abdomen 



of a coppery-red color; the apex of second vein about opposite the 



posterior cross-vein i<-hiiCunionea Brauer, %, ^■ 



Wings with one distinct cross-band and an apical spot; abdomen bluish-black : 

 the end of second vein far before the posterior cross-vein. 



calliclironia Kig., %,9- 



8. The apical hyaline space wider or as wide as the biowu band before it ; thorax 



bluish ; no frontal or prfescutellar bristles. . . .aiiiiiilata Fab., '^ , ? . 



The apical hyaline space much narrower than the brown band before it ; at 



least two frontal and one prsescutellar bristles present 9. 



9. Fore tarsi entirely white; apical cell open ; hind femora with a distinctly 



oblique whitish ring beyond the middle aiigiilala I/W , %,^. 



Fore metatarsi only white; apical cell closed in the niaigm ; the ring on the 

 hind femora not distinctly oblique Ia>»<*iva Fab., % , ^ . 



Caloliata uiiivilta Walker, List, iv, 1049, 1849. (PI. I, figs. 3 and 4.) 



Yellow to rufous, with black or brown markings. Front opaque, with narrow 

 silvery side stripes, and a large silvery triangle at each side of the vertex, which 

 are nearly confluent behind the black ocellar tubercle; this tubercle is situated 

 nearer the vertex than to the antenna;; no post-vertical or frontal bristles. Face 

 and cheeks white, silvery in certain aspects; clypeus whitish, not prominent. 

 Antennse yellow ; second joint darker; third about one and a half times as long 

 as the second, apex rounded ; arista shortly plumose. Occiput .strongly convex ; 

 lower part of orbits with a large silvery spot confluent with the silver of the 

 cheeks. Thorax shining, with a narrow median blackish vitta, widening over 

 the scutellum ; this vitta is more distinct in the male, but is often nearly invisi- 

 ble. Lower part of pleurae whitish poUinose; metanotum with a black median 

 si)ot. Halteres whitish. .46do?ne»t shining, with a black median stripe, which is 

 broader in the female, interrupted at the incisions; fifth and sixth segments of 

 male distinctly constricted laterally, and the genital segment much enlarged; 

 the translucent yellow clasps of male, situated beneath the third segment, are 

 broad and flattened, their apices bent in form of hooks and their anterior inner 

 margins provided with minute black spines. Ovipositor of female with a black 

 median stripe, broadened laterally at the base, where it is nearly cylindrical, 

 then tapering laterally to a truncate apex (see drawings). Legx yellow; hind 

 femora with a preapical blackish band or only a spot underneath at the apex. 

 Win(is hyaline, with the first posterior cell open ; anal cell as short as the second 

 basal cell, the lower angle about right angular. Length 5-7 mm. 



One S, Highrolls, New Mexico (Viereck and Kelin),an(l .<evenil 

 pairs from Pennsylvania. 



In this and the next following species (C. alcda Walk.) it will he 

 seen, l)y referring to figures 3 and 4 of Plate I, which represent the 

 genitalia of these species, that these members are greatly enlarged. 

 The genital segments of male are complicated and more or less 

 globidar in form; the clasps, it will l)e noticed, are broad and ratlier 



TRANS. AM. ENT. SOC. XXXIV. JANUARY. 1908. 



