REVISION OF STREPSIPTERA — PIERCE. 169 



ters at apex; trochanters curved, socket-shaped ; femora cylindrical, 

 enlarging apically, obliquely truncate, and grooved for the reception 

 of the tibiae, which are much smaller in diameter at all points than the 

 femora ; tibiae enlarged gradually toward apex, but not equaling length 

 of coxae and trochanters. Tarsi not as long as tibiae. The ninth 

 segment occupies about a third the length of the abdomen. From the 

 anal extremity the cedeagus is reflexed forward, slightly sinuate, with 

 apex turned upward, and is protected laterally by two high flexible- 

 flaps, winch are contiguous at their upper anterior corners and gradu- 

 ate obliquely to the base of the genital tube. The tenth segment is 

 somewhat obscure in the concavity of the ninth. The cedeagus is 

 glabrous, hyaline yellow, abruptly tapering and acute at the apex; 

 the lateral flaps are very pubescent. The wing venation differs from 

 that of the typical Elenchus, as does also the metathoracic scutellum. 



Female. — The female is very different from the xenid type. No 

 sign of mandibles can be found. The head composes the greater part 

 of the disk with the oral aperture marginal. The thorax seems to be 

 sunken into the abdomen, with an immense opening to the brood 

 canal. 



According to Perkins it is described as follows: 



Head brownish or pitchy, opening of the brood chamber far behind the middle 

 and very large, no anterior median area and tubercles defined, but with a faint 

 round spot just in front of the brood-chamber orifice on each side of the middle line. 

 Length, \ mm. (Perkins, 1905.) 



Type.— Cat. No. 9028, U.S.N.M. 



35. PENTAGRAMMAPHILA, new genus. 



Type of genus. — Pentagrammaphila uhleri Pierce. 

 This genus is typically American and parasitic on the genus Penta- 

 gramma. 



i. PENTAGRAMMAPHILA UHLERI, new species. 



Female. — Length of cephalothorax 0.35 mm., breadth at spiracles 

 0.38 mm., breadth at base of head 0.34, distance between mandi- 

 bles 0.098 mm. Cephalothorax; reddish-brown subquadrate, spira- 

 cles at basal angles, sides oblique, apex truncate with rounded lobe in 

 front of mouth ; spiracles not prominent ; head occupying one-half the 

 length of the cephalothorax; mandibles elongate oblique, obtuse. 



Type.— Cat. No. 12317, U.S.N.M. 



Named in honor of Dr. P. R. Uhler, in whose collection were found 

 Pentagramma vittatifrons Uhler, collected by Rothauer in "Dacota," 

 in which this species was taken. The locality "Dacota" includes 

 North and South Dakota, Wyoming, Montana, and probably part of 

 Idaho, so it is not very definite. 



