seta 7, in form of a membranous tubercle with short sclerotized sensilla 

 and a small, light seta. Frontoclypeus slightlj' widened near the anterior 

 margin, with shallow lateral orientations. Gula narrow, long, with curved 

 sides, extending from anterior to posterior margin of head; gular suture 

 therefore absent; a rugose, brown, longitudinal margin on the sclerites 

 lateral to the gula. Setae of head only primary, many of them long; seta 

 14 longer than the others, seta 10 well developed, seta 17 long. 



Labrum wide, with deep median indentation inside which the surface 

 is tuber culate; setae 1,2, and 4 form thick, light spines. Mandibles slightly 

 oblong, with large, sharp, distal tooth; dorsal blade of left mandible usually 

 with 3 teeth, ventral blade with 2 teeth; right mandible with 2 teeth on the 

 dorsal and ventral blade; median depression without brush, except in 

 one genus; outer setae dark, moderately long in the basal part. 



Sclerites of cardo dark, distinct; submentum light with an indistinct 

 yellowish or whitish, thin, median sclerite which may be absent; mentum 

 short, dark, reddish brown; galea cylindrical; maxillary palps short, 

 segments of about the same length; labial palps relatively large, one- segmented. 



Pronotum short in the middle, posterior part separated by a rugose 

 transverse border from the other part; pattern dark, distinct; anterior - 

 margin and secondary surface setae not numerous. Tergites on mesonotum, 

 if present, situated in the middle of anterior third of segment; anterior -angle 

 setae of meso- and metanotum, together with the primary seta, form a tuft 

 of 6— 10 setae on a thin, round, light yellowish or whitish sclerite with dark 

 dots. 



Prothoracic pleuron small, dark; anterior membranous tubercle-shaped 

 process of separated trochantin with short distal seta and 2 snaall setae. 

 Meso- and metathoracic pleura large, pleural suture in form of a black 

 groove; episternum indistinct in form of a narrow brown stripe adjacent 

 to the suture, epimeron larger, with black distal margin; trochantin in form 

 of a black distal sclerite, divided from episternum by a small, light bar with 

 the large, black seta of the trochantin, both small setae situated further 

 distally; seta of epimeron situated near posterior margin. 



Prothoracic sternite near posterior margin of segment in form of a 

 small, dark, triangular sclerite. A large, light, horn-shaped process 

 ("horn") situated anterior to the sternite, with blunt or pointed apex 

 which bears the opening of Gilson's gland. 



Forelegs more massive than midlegs, both about the same length; hind 

 legs much longer, femur straight, rodlike. Trochanter of all legs not 

 colored dorsally. The posterior of the 2 distoventral setae of the dbia 

 situated ventrally at the apex in form of a thick, blunt spine, anterior seta 

 situated subventrally some distance from the apex, also in form of a 

 spine, but usually slightly longer and thinner. Some of the large, primary 

 setae of the legs very long. Small, scale -shaped chaetoids in basal part 

 of coxae; trochanters, femora, tibiae, and sometimes also tarsi, with a 

 dense ventral comb of light, small or large spinules. 



Abdominal segment 1 shorter than the following segments; dorsal 

 process large, conical, with characteristic pointed apex; lateral processes 

 with rounded apex, with small, dark, in some places divided, spinules, one of 

 the primary lateral setae situated among the spinules, the second further 

 ba sally. 



14 



