NO. 2242. MORPHOLOGY OF THE ^TREFSIPTERA— PIERCE. 469 



Female cephalothorax almost triangular, narrowly truncate at apex; head 

 about one-third as wide as metathorax at spiracles. Parasites of Ualictus. 

 3. Halictostylops Pierce. 



Female cepthalothorax very broad at base, triangular, convexly truncate at 

 apex, strongly constricted at base of head ; breadth of cephalothorax at 

 widest point 1.5 times as wide as breadth of head at base. Parasite 

 of AugocMora 4. AugochloropMlus Pierce. 



LIST OF SPECIES. 



1. H. {Halictoxenos) crawfordi Pierce; parasite of HaUctus (ChloraliGtus) 



hruneri Crawford, Nebraska. 



2. H. (H.) graenicheri Pierce; parasite of H. (C) albipennis Robertson; Wis- 



consin. 



3. E. (H.) jonesi Pierce; parasite of J/. (C) species; Texas, Louisiana. 



4. //. (H.) nymphaeari Pierce; parasite of H. (C.) nymphacarum Robertson; 



Illinois. 



5. H. (H.) sparsi Pierce; parasite of H. (C.) sparus Robertson; Oklahoma. 



6. H. (H.) versati Pierce; parasite of H. (C.) versatus Robertson; Wisconsin. 



7. H. (E.) :^ephyri Pierce; parasite of E. (C.) zephyrus Smith; Wisconsin. 



8. E. (Ealictophilus) manilae Pierce; parasite of //. (Erylaeus) nianilae 



Ashmead; Philippines. 



9. H. (E.) robbii Pierce; parasite of i^. (E.) ro&&ii Ashmead ; Philippines. 



10. H. (Ealictostylops) spcnHi l>iassono\v: pnrasite of Ealicttis minutus Kirhj ', 



Europe. 



11. H. {Augochlorophilvs) viridvlac Pierce; parasite of Angochlora viridula F. 



Smith ; Illinois. 



3. HALICTOXENOS JONESI Pierce. 



Errata : Gen. Insect., p. 21, line 12, add " PI. 3, unnumbered figure." 



15. Genus APRACTELYTRA Pierce. 



1. A. schwarzi Pierce; host unknown; District of Columbia. 



1. APRACTELYTRA SCHWARZI Pierce. 



Errata : Gen. Insect., p, 22, line 21, add " PI. 2, unnumbered figure " ; pi. 2, 

 unnumbered figure, for " Aproctelytra " read "Apractolytra." 



2. Subfamily Crawfordinae Pierce. 

 16. Genus CRAWFORDIA Pierce. 



1. C. pulvinipes Pierce; parasite of Panurginus innuptus Cockerell; 



Nebraska. 



2. C. cockerelU Pierce; parasite of Panurginus hoylei Cockerell; 



New Mexico. 



3. O. labrosi Pierce; parasite of Panurginus lahrosus Robertson; 



Illinois. 



4. C. rudheckiae Pierce; parasite of Panurginus rudheckiae Robert- 



son; Illinois. 



