No. 22.] HYMENOPTERA OF CONNECTICUT. 66l 



The insects falling into the subfamily Crabroninse may be 

 separated into two tribes by the following key. 



Key to Tribes. 

 Abdomen depressed, flat beneath; second discoidal cell much 



longer than first, acuminate at tip anacrabronini p. 66l 



Abdomen seldom subdepressed, convex dorsally and ven- 

 " trally; second discoidal cell shorter than first, usually very 

 much so, broadened and subtruncate at tip . .crabronini p. 66i 



ANACRABRONINI. 



Anacrabro Packard. 



A. ocellatus Packard. 



Length 6-8 mm. Black ; tubercules, line on metanotum, tips of 

 all the femora, tibise and tarsi (except a black spot on the former 

 internally), and a large spot (sharply trunctate externally, and 

 more or less pointed within) on first to fifth dorsal abdominal 

 segments, yellow. Wings subhyaline basally, apically fuscous. 

 Mesoscutum and mesepisternum with strong, separate punc- 

 tures. According to Dr. Barth (Bull. Wisconsin Nat. Hist. Soc, 

 vol. 6, pp. 147-153, Pis. 7-9), this species nests in sand banks and 

 provisions its nest with the bug Lygus pratensis. 



Hartford and Black Point in July (S. N. D.). 



CRABRONINI. 



The Nearctic species belonging to this tribe were tabulated by 

 Fox in a paper entitled " The Crabroninse of Boreal America," 

 which appeared in the Transactions of the American Entomolog-^ 

 ical Society, vol. 22, 1895, pp. 129-226. In this paper Mr. Fox con- 

 sidered that all the species placed in the tribe Crabronini, as here 

 treated, belong to one genus. Later, in 1898, Ashmead tabulated 

 the genera of Sphecoidea of the world, and considered the Crab- 

 roninas of Fox to be a family composed of a number of sub- 

 families. In his paper Ashmead raised nearly all of Fox's 

 species groups to generic rank. In the present paper the tribe 

 Crabronini is considered as comprising, as far as our region is 

 concerned, four genera, each of which may be divided into sub- 

 genera, some of which occur in the State. These genera may be 

 separated by the following table : 



