»o. 2242. MORPHOLOGY OF THE STREP8IPTEBA— PIERCE. 475 



2. P. phaeodes Perkins ; parasite of Hecalus immaculatus Kirkaldy. 



3. P. stenodes Perkins ; parasite Paradorydium menalus Kirkaldy ; 

 Queensland. 



4. P. schwarzi Pierce; parasite of Diedroce'phala sanguinolenta 

 Coqiiibar ; Guatemala. 



38. CYRTOCARAXENOS, new genus. 



Name derived from kvptos (curved) + ndpa (head) + Xenos. 



Characterized by a very large head, emarginate behind, with tre- 

 mendous eyes; antennae with branches closely appressed, not sur- 

 passing one another. Prothorax quadrate invisible at sides. Meta- 

 notum with only two transverse areas. Metapraescutum broadly 

 separated from scutellum but considerably longer than the same. 

 Eighth abdominal segment greatly" produced beneath the ninth. 

 Oedeagus barbed at apex. 



Type of the genus. — Cyrtocaraxenos javaiiensis, new species ; Java. 



CYRTOCARAXENOS JAVANENSIS, new species. 



Plate 78, figs. 1-6. 



Collected at light, 800 feet altitude, at Buitenzorg, West Java, 

 December, 1908, by W. Terry, and presented by Mr. F. Muir. 



Length about 2 mm. ; dark brown. Head emarginate from dorsal 

 and anterior views for reception of pronotum. Mandible short, but 

 reaching mouth. Maxillae short, 2- jointed, the joints very broad 

 and subequal. Pronotum trapezoidal. Mesonotum transversely 

 divided, posteriorly produced at angles. Metanotum with praescu- 

 tum keystone shaped, broad at apex, broadly separated from scutel- 

 lum by scutum ; parascutellum diagonal ; scutellum transverse ; sinuate 

 in front; postlumbium short and transverse; postscutellum very 

 large. Legs normal, first tarsal joints mucronate. Oedeagus slightly 

 curved, with apex sharply reflexed, the inner and outer angles being 

 very acute. Wings with seven principle veins, and with two detached 

 beins between radius and medius ; medius not broken. 



Type.— C^t. No. 21454, U.S.N.M. 



39. DELPHACIXENOS, new genus. 



The generic name is derived from DeVphax (the host genus) -f- 

 Xenos (the typical Strepsipterous genus), signifying a strepsipte- 

 rous parasite of Delphax. 



Mcde. — Head excavated behind, seen from above consisting of a 

 narrow arcuate rim supporting the eyes and produced somewhat in 

 front of these to form the apex of the frontal projection, at the sides 

 of which the antennae are inserted. Eyes large, convex, reaching 

 the base of the elytra when the body is compressed ; facets large and 



