212 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 43. 



Genus SCIAPTERYX Stephens. 



SCIAPTERYX COQUILLETTl, new species. 



Differs from the genotype of Sciapteryx (cosfniis Fabricus) in the 

 shorter malar space and larger metepimeron, besides manj minor 

 characters. 



Female. — Length 9 mm. Labrum truncate apically, sides sub- 

 parallel; clypeus short, convex, angulately emarginate; interantennal 

 line slightly shorter than the antennocular line; supraclypeal foveas 

 shallow, not distinctly connected with the antennal fovese, but con- 

 nected with each other; antennal and postocellar furrows obsolete, as 

 is also the middle fovea; postocellar line subequal with the ocelloccip- 

 ital line, but distinctly shorter than the ocellocular line; malar space 

 shorter than the pedicellum ; fourth and fifth antennal joints subequal ; 

 head and thorax closely and rather coarsely punctured, in the front 

 punctato-granular; stigma angulate at basal third, obliquely truncate 

 apically; abdomen impunctate; sheath straight above, rounded from 

 upper apex. Black; clypeus, labrum, spot on mandible, palpi, angles 

 of pronotum, tegulte, spots on propodeum, apical dorsal segment, 

 apices of four anterior femora, their tibiae and tarsi, posterior femora 

 except a black line beneath, posterior tibiae except apex, most of hind 

 basitaris yellow; head and thorax with gray hairs; wings hyaline, 

 iridescent; venation pale brown. 



Male. — Length 9 mm. The above description will fit the male 

 very well. The antennae are slightly longer and somewhat flattened; 

 hypopygidium broadly rounded apically; apical ventral segment 

 deeply emarginate. 



Los Angeles County, California. A male and female collected by 

 D. W. Coquillett, for whom the species is named. 



Type.— C&t. No. 14256, U.S.N.M. 



Genus LAGIUM Kono^^^. 



The genus Lagium was founded by Konow for Tenthredo atroviola- 

 ceus Norton. The species of this genus are closely related and can be 

 separated only by the use of apparent trivial characters, except m the 

 males where the genitalia offer good differences. It is not always 

 possible to associate the sexes, and in none of the following cases is 

 there positive proof that the males and females placed together are 

 the same species, but by deduction it seems reasonably certain that 

 they are. Except for notes on the larva of peratrum, which feeds on 

 Sanhucus, nothing is known about the life history of the genus. Dr. 

 H. G. Dyar, in describing peratrum, said that the larvae were "remark- 

 ably specialized" for Tenthredinidae. The adult is one of the more 

 specialized forms of Tenthredinini. The terms used in the genitalia 



