HYMENOPTEROUS PARASITES. 269 



shagreened, more densely so above. Eyes bare; malar space half as 

 long as the eye, without furrow. Antennse 10-jointed; scape half as 

 long as the pedicel and flagellum together, much thickened apically; 

 pedicel narrow at base, twice as long as thick; four funicle joints much 

 more slender than the pedicel, the first and fourth short, quadrate, 

 and the second and third considerably longer than thick; club 4- 

 jointed, joints of about equal length, as broad as long. Mesonotum 

 shining, very delicately shagreened, distinctly longer than wide; 

 parapsidal furrows obsolete, indicated only by a depressed spot on the 

 hind margin of the mesonotum; basal scutellar groove narrow, but 

 deep. Scutellum highly convex, with a short, slightly curved and 

 upturned thorn at apex. Pro- and mesopleurse smooth and shining; 

 metapleura punctate and densely hairy, as is also the first abdominal 

 segment; lateral angle of propodeum with a long, straight, backwardly 

 and outwardly directed slender spine. Second segment of abdomen 

 almost as broad and as long as the thorax, polished, with scattered, 

 short, white bristles; broadest just before the middle; third minutely 

 punctured, narrowed apically, the tip only one-fourth as wide as the 

 base of the second. In fully extruded specimens the following seg- 

 ments are very slender, and proportioned as follows, fourth as long as 

 the remainder of the body, the fifth and sixth each as long as the body, 

 including the third segment. In retracted specimens the fourth seg- 

 ment may be only half as long as the second and the fifth and sixth 

 each not over one-half to two-thirds as long as the second. The ovi- 

 positor is rarely extruded to any extent, except in otherwise greatly 

 extended examples. Fourth to sixth segments shining, but under high 

 magnification, distinctly scabrous ; on these segments the sharp lateral 

 edge is visible, but becomes obsolete on the second, except at the 

 extreme base. Fore wing with only very minute marginal cilia; disc 

 hairy, the hairs large and sparse, forming indistinct lines; basal third 

 with minute hairs. Hind wing with two frenulum hooks. 



Type and numerous paratypes from Kartabo, British Guiana, 

 August 20 and 21, 1920, ovipositing as previously described in a cvit 

 stump, containing larvae of the Itonidid, Janetiella sp. 



This species differs from D. hopkinsi Crawford and Bradley- ('11) by 

 its much smaller size, almost entirely obsolete parapsidal furrows and 

 somewhat different color. The club of the antenna and the fifth and 

 sixth segments ^ of the abdomen are entirely black, not brown as in 

 the North American species. 



1 Not the fourth and fifth as stated by Crawford and Bradley; the third is 

 short and narrow and so closely attached to the second that tliej' have con- 

 sidered it as a part of the latter. 



