100 BULLETIN 66, UNITED STATES NATIONAL MUSEUM. 



12. STYLOPS CORNII, new species. 



Host. — Andrena commoda Smith (corni Kobertson, det. S. Grae- 

 nicher); Milwaukee, Wisconsin, June 17, 1906; S. Graenicher. 

 Described from one female and its triungulinids, presented by Dr. 

 Sigmund Graenicher, of Milwaukee (pi. 3, fig. 4). 



Female. — Length of cephalothorax 1.20 mm., breadth at spiracles 

 1.11 nun., breadth at base of head 0.60 mm., distance between man- 

 dibles at base 0.15 mm. Cephalothorax light brownish with dark 

 brown transverse band at base; a little longer than broad, wedge 

 shaped, roundingly truncated at apex; truncation less than one- 

 third breadth at spiracles. Head slightly constricted laterally at 

 base of mandibles; edge from this point to spiracles convex. Man- 

 dibles broadly rounded, armed at apex with outward pointing tooth, 

 and at basal third of outer margin with small tumidity. Mouth 

 elliptical. Spiracles laterally prominent. 



A paratype collected at the same place June 2, 1902, has the follow- 

 ing dimensions: Length of cephalothorax 1.26 mm., breadth at spira- 

 cles 1.22 mm., breadth at base of head 0.73 mm., distance between 

 mandibles at base 0.20 mm. The difference between these two is 

 probably very near to the extreme variation in size. 



Triungulinid: Length of body 0.21-0.22 mm., length including 

 stylets 0.31-0.35 mm., breadth of head 0.037-0.042 mm., greatest 

 breadth 0.066 mm., breadth of ninth abdominal segment 0.03 mm. 

 The characters are essentially the same as those described for Styloys 

 californica. 



Type. — Female and triungulinids, Cat. No. 10087, U.S.N.M. 



13. STYLOPS CRAWFORDI, new species. 



Host. — Andrena Crawfordi Viereck (det. H. L. Viereck) . Described 

 from two males collected at Dallas, Texas, April 27 and 28, 1906, 

 and from many females collected by Mr. J. C. Crawford and the 

 author (fig. 3, nos. 5, 6; pi. 2, figs. 5, 6, 8, 9, 10, 11, 12; pi. 3, fig. 5). 



Male. — Color black; antennae and legs brown; last two abdom- 

 inal segments flavous ; wings hyaline, with veins light brown. Length 

 of body 4.5 mm., length of head and thorax 3.5 mm., breadth of 

 head 1.05 mm., length of antennae 1.36 mm., length of oedeagus 0.40 

 mm. Antennas with first two joints short, subequal, cupped at apex; 

 third joint laterally reaching to about the middle of the sixth; joints 

 3 to 6 in the proportion of 65, 36, 18, 21.5. Mandibles subcylin- 

 drical, tapering on dorsal edge, but apically flattened laterally and 

 toward tips somewhat enlarged, then obliquely truncate. Palpi 

 not quite as long as fourth and fifth antennal joints, with basal 

 joint longer than the apical. (Edeagus at base triangularly trun- 

 cate externally, at basal one-third with a long shallow emargination 



