No. 22.] HYMENOPTERA OF CONNECTICUT. 68l 



stroying injurious insects belonging to this order. An interesting 

 account of Sphex and her caterpillars, with a number of figures, 

 will be found in Chapter i of Peckham's " The Solitary Wasps." 



Key to Subgenera. 



Petiole of abdomen part of first segment Psammophila p. 68l 



Petiole of abdomen composed of entire first and part of 

 second segment Sphex p. 68i 



Subgenus Psammophila Dahlbom. 

 Key to Species. 

 Body black or with a faint bluish tinge; mesonotum shining, 



transversely striate ' luctuosa 



Abdomen partly reddish; mesonotum transversely striate; 



petiole extending beyond apex of hind trochanters 



violaceipennis 

 °S. (P.) luctuosa Smith. 



This and the following species will no doubt be found within 

 the State, but no positive date is available of their having been 

 taken there. 



°S. (P.) violaceipennis LePeletier. 



Subgenus Sphex Linnaeus {s. str.). 



So far only one species has been recorded from the State, but 

 many more occur there, no doubt. 



Key to Species. 



1. Mesonotum with complete transverse striae 2 



Mesonotum punctate, smooth or incompletely transversely 



striate 3 



2. Pleurae with silvery spots; abdomen black abbreviata 



Pleurae with elongate silvery marks; abdomen in part red; 



dorsal aspect of propodeum with some oblique striae, .procera 



3. Wings yellowish or fulvous; head and thorax with matted 



black pubescence, a spot of golden pubescence above bases 



of mid and hind coxae extrematata 



Wings not yellowish, subhyaline or darker 3 



4. Pleurae without pubescent markings, .extrematata var. pictipennis 

 Pleurae with pubescent markings 5 



5. Mesonotum with appressed sericeous pubescence and erect 



hairs ^ 



Mesonotum without appressed pubescence but with erect 



hairs 7 



