UU'LATTS. SO' 



sides and metazona flat ; in the $ usually more rounded and 

 broader ; the pronotum extends shghtly over the elytra. Scu- 

 tellum small and triangular. Elytra broad and ample, usually 

 long and convex or truncate posteriorly, M-ith no humei'al carina. 

 Wings generally long ; squamse generally pointed ; a triangular 

 membranous patch often exposed ; rarely abortive. Femora feebly 

 keeled ; first tarsal segment very long and slender, longer than 

 second and third united ; second very short, rather broad ; third 

 segment about half as long as first, a little broader; pulvilius 

 present between the claws. Abdomen in the 6 slender and cylin- 

 drical ; the segments distinctly separated ; lateral tubercles on 

 segments three and four generally more distinct in the $ than 

 in the 6 ; towards the apex a little broader, sometimes notably 

 so. Last dorsal segment of d" ample, smooth, tumid, truncate 

 posteriorly, sometimes very remarkably widened and quadrate. 

 In the 5 the abdomen is usually broader and more depressed, 

 not widened apically, but narrowed down the last dorsal segment 

 which is sloping, long, and veiy narrow. Penultimate ventral 

 segment in the d very ample, completely covering the last seg- 

 ment, quadrate, angles rounded, posterior margin truncate or 

 sinuate, or deeply emarginate. Pygidium not visible. Forceps 

 of c? stout, straight, conical and contiguous, usually depressed, 

 flat beneath and keeled above, dilated near the base to form a flat 

 dilation recalling typical Fovficula or merely forming a flat triangular 

 tooth, and then attenuate and arcuate so as to enclose an elliptical 

 area. In the $ simple, straight, very short, and contiguous. 



Larvae depressed ; instead of forceps, having long segmented 

 caudal styles, resembling antennae ; number of segments varying 

 from about 15-30 ; segments cylindrical, gradually lengthening 

 after the second, the basal segment equalling in length the next 

 five or six segments. This long basal segment is the sheath of the 

 future forceps. 



Eange. Tropical Asia, Africa and America. 



This genus is one of the most interesting and also one of the 

 most difficult. In 'Das Tierreich,' de Bormans gave a table for 

 the half dozen species which he knew, based entirely upon colour 

 alone. It is consequently impossible to discriminate any species 

 by means of that work. 



The inherent difficulty of the genus is complicated by the 

 sexual dimorphism ; it is, at present at least, only possible to 

 allocate females to their respective places by guesswork, as the 

 form of the head and pronotum is usually different in the female 

 from the same pai'ts in the male, and, of course, the anal parts 

 differ also. It is accordingly particularly desirable that no new 

 species of Diplatys be described from females only. 



It is also probable that there may be two different types of 

 coloration in one species. It may eventually be proved that 

 D. gersto'clceri, \2Lr. caUdasa is really a yellow variety of the large 

 fuscous D. siva, and the same thing may occur in certain African 

 species. 



