THE CANADIAN ENTOMOLOGIST 311 



swelling slightly in from the margin; a single long hair and two 

 or three shorter ones at the margin bn the lateral swelling: a close 

 fringe of short hairs on the anterior margin of the temples; a 

 transverse row of four long hairs on the occiput between the 

 occipital bands. 



Prothorax nearly as long as wide, rather quadrate in shape, 

 rounded posteriorly; two or three short spines and a hair on each 

 "shoulder," and six short hairs along the posterior margin. 



Mesothorax and metathorax nearly equal in length, separated 

 by a distinct suture. Metathorax with a transverse row of long 

 hairs on the posterior margin. 



Legs of the type common to the genus, the anterior femora 

 flatten'ed and much expanded. 



Abdomen elongated, with nearly parallel sides, widest across 

 the fourth or fifth segment. Each segment with a single transverse 

 row of hairs along the posterior margin, the hairs not as long as 

 the succeeding segment. Second to ninth segments each with a 

 single extremely long hair and one or two shorter hairs at each 

 posterior lateral angle. 



Pleurites distinct, separated from the sternites by a narrow 

 clear area, the posterior margin of each pleurite bearing a row of 

 five or six short, thorn-like spines. First sternite short, heavily 

 chitinized, the posterior angles produced back over the second 

 sternite. Remaining sternites less heavily chitinized, but quite 

 distinct. Each sternite with a transverse row of four to eight 

 short, slender hairs along the posterior margin, the second to .fifth 

 with a few other scattered hairs. Fifth and sixth each with a 

 distinct patch of closely set spines in each posterior lateral angle. 



Description of male — Length 1.9 mm. Very similar to the 

 female, the abdomen somewhat more pointed. Genitalia of the 

 type common to this genus and to Myrsidea. 



Two males, a female and two immature forms from CoUocalUa 

 sp. (Samarang, Java, E. Jacobson coll.). 



A very distinct species, differing in the truncate anterior 

 margin of the head from any other of the genus, but in other 

 respects an entirely typical Dennyus. Types in the Stanford Uni- 

 versity collection. 



