46 INSECUTOR INSCITI/E MENSTRUUS 



A NEW GENUS AND TWO NEW SPECIES OF 

 CHLOROPIDy^ (DIPTERA) 



By J. R. MALLOCH 



Eugaurax, new genus. 



Separable from Gaurax by the much shorter haired, pubescent arista ; 

 the possession of two notopleural and four supraalar bristles, and a trans- 

 verse row of strong, black, prescutellar bristles, 8- 1 in number, on the 

 mesonotum, as well as a series of about 8 strong marginal scutellar bristles. 

 The scutellum is flattened and the posterior margin rounded in outline, 

 with about 8 strong marginal bristles, the middle pair of which are strong- 

 est. In other respects, ventation, etc., similar to Gaurax. From Botano- 

 hia, Eugaurax may be distinguished by the chaetotaxy of the mesonotum. 



Type of genus Eugaurax floridensis, new species. 



Eugaurax floridensis, new species. 



Female ; Head yellow, opaque ; frons slightly over one-third the width 

 of head at vertex, slightly wider anteriorly, entirely yellow except for the 

 ocellar region, which is black ; ocellar triangle distinct, almost as wide as 

 frons at vertex, and reaching midway to anterior margin ; entire surface of 

 frons, except triangle, with short, scattered black hairs ; post- vertical bristles 

 cruciate, outer vertical bristle strong, inner pair hair-like ; eyes pubescent ; 

 antennae yellow, of moderate size, third joint rounded, browned on upper 

 surface ; arista yellow, apical half brown, shortly pubescent, the base with an 

 elongate thickening ; face and cheeks whitish yellow, the former wath a slight 

 keel ; height of cheeks less than one-fourth that of eye ; eye one and one-half 

 times as high as broad ; proboscis and palpi pale yellow, the latter of good 

 size, bare. Mesonotum yellow, subshining ; disk with a broad, posteriorly 

 quadridentate brown mark, the center portion of which, on the anterior 

 margin, and the tips of the outer posterior prolongations are black ; there 

 is also an indication of a black mark on the rounded portion behind the 

 humerus on each side, and anterior to the suture ; the center two teeth of 

 the disced marks are considerably shorter than the outer two ; disk covered 

 with short, pale hairs, the bristles throughout black ; pleurae glossy yellow ; 

 scutellum yellow, disk with very line, pale, scattered hairs; poftnotum 

 glossy black. Abdomen yellow, with a black spot on the center of each 

 segment forming a dorso-central line, and a triangular spot on anterior 

 margin of each segment laterally, which gives indications of coalescing 

 with the central spots, forming a series of tridentate transverse fasciae. 



