422 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



c. Dissimilar sexual development. 



d. Pupation in puparium (male). 



e. No pupation in female. 



15. Always parasitic, female never free. 

 IG. Always larviparous. 



17. Each morphological group confined to a definite group of hosts. 



18. A type of parasitism which sterilizes but does not kill until 

 the young parasites are free from the parent. 



DESCRIPTIONS OF STREPSIPTERA. 



Order STREPSIPTERA Kirby. 



SYNONYMY. 



Corrections to Bulletin 66, page 82 : 



Line 31. Xcnos, 1793 (a genus next to Ichneumon), Rossi, 1793. 



Line 32. Phthiromyiae, 1S09 (Tribe III, Diptera), Latreille, 1809. 



Line 46. Strepsiptera, 1859 (a family, Neuroptera Trichoptera ) , Gegenbaur, 

 1859. 



Corrections to Genera Insectorum, fasc. 121, page 2 : 



Line 3. Phthiromyiae. Latreille (tribe 3, Diptera), Gen. Crust. Ins., vol. 

 4, p. 388 (1809). 



Line 7. Strepsiptera. Gegenbaur (family, Neuroptera Trichoptera), 1859. 



Line 11. Slylopides. Lacordaire (family, Coleoptera), Gen. Col., vol. 5, pp. 

 634-G41 (1859). 



In view of many new lights on the classification new descriptions 

 are given to many groups and genera and detailed studies have been 

 made of the transition of various characters from group to group. 

 Notwithstanding the many new characters brought out there is no 

 change necessary in the family classification except as to the position 

 of Stichotrematidae. This fact amply bears out the author's original 

 choice of superfamily and family characterizations. 



Table of siiperfnmilies of Strepsiptera. 



1, Male tarsi with five joints and two tarsal claws, prothorax and mesothorax 

 short, transverse; metapraescutum entirely in front of the scuti and not 



extending between them. Female unknown 1. Mengeoidea Pierce. 



]\Tale tarsi lacking at least one joint and claws 2. 



2 Female thoracic spiracles more or less easily discernible, generally promi- 

 nent. Slale tarsi with four joints (possibly not in Stichotrematoidea)_ 3. 

 Female thoracic spiracles not usually discernible, never prominent ; Ho- 



moptera parasites 4. 



3. Female with three rows of 12 or more genital tubes entering brood canal. 



Males unknown. Orthoptera parasites 2. Stichotrematoidea Hofeneder. 



Female with four of five unpaired genital tubes entering brood canal. Male 

 tarsi with four joints; prothorax and mesothorax short, transverse. Para- 

 sites of Hymenoptera and Hemiptera 3. Xenoidca Pierce. 



