576 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



S. quadriceps Ashmead. 



Black. Legs reddish yellow, with dusky coxas. Antennae 

 rufous-yellow. Metathorax with a median carina and a large 

 smooth area on each side. Cauda as long as the hind metatar- 

 sus. Posterior tibial spur a little less than one-half the length 

 of the metatarsus. Length 4 mm. 



New Haven, 31 October, 1903 (H. L. V.). 



HELORID^. 

 Helorus Latreille. 



Tarsal claws pectinate ; wings with the basal nervure abruptly 

 broken and bent downwards, forming a triangular discoidal cell. 

 Antennae 15- jointed. 



H. paradoxus Provancher. 



Shining black. Tegulae and legs pale rufous ; the coxae black, 

 and the femora darker toward the base. Wings hyaline. Length 

 4-5 mm. 



Parasitic on the cocoons of Chrysopa. 



Stafford, 24 August, 1905 (W. E. B.). 



PELECINID^. 

 Pelecinus Latreille. 



A single species occurs very commonly within the state. It 

 is the largest of all the Serphoidea found here. 



P. polyturator Drury. PI. ix. Fig. i. 



Black. Annulus on antennae and male tarsi whitish. Abdo- 

 men of female about five times the length of the head and thorax, 

 composed of six slender cylindrical segments. Abdomen in male 

 clavate, the petiole as long as the abdomen, about the length of 

 the head and thorax. Length : female 50-60 mm., male 22 mm. 



Parasitic on the grubs of May beetles of the genus Lachnos- 

 terna. 



New Haven, 24 August, 1904, 7, 18 August, 1906, Cheshire, 

 18 August, 1906 (P. L. B.) ; Scotland, 10 August, 1905 (B. H. 

 W.).; Suffield, 26 July, 1906, New Haven, 14 August, 1906 (W. 

 E. B.). 



