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



2. Head black, with the following parts ferruginous: spot on 



the side of face and on the apical middle of clypeus, broad 

 line on cheeks, and two spots behind ocelli; antennae in 

 great part pale yellow; wings hyaline, with a fuscous 

 band beneath stigma; abdomen violaceous black, trans- 

 versely banded at middle with yellowish ferruginous. 



Length 15 mm fascipennis 



Head rufous, with a black spot around ocelli, extending to the 

 bases of antennae; tegulse and immediate adjacent parts 

 of pronotum and wings ferruginous; body, including wings, 

 violaceous black. Length 18 mm frontalis 



3. Scutellum yellow; head and thorax black, with the usual 



straw-yellow markings; antennae black; abdomen black, 

 with a rufous or honey-colored transverse band on seg- 

 ments two to four and the tip of the anal segment of the 



same color; wings faintly clouded. Length 11 mm 



canadensis 

 Scutellum black 4 



4. Head and thorax blackish, with the usual yellow spots; 



.antennae varying from yellow to blackish fuscous; abdo- 

 men entirely luteous or with an irregular median blackish 

 band; legs luteous, front and middle femora black above, 



posterior entirely black. Length 11 mm mathematica 



Head and thorax black, with clypeus and three elongate spots 

 extending from it between the antennas and along the 

 inner orbits, outer orbits, tegulse, and an Bblique pleural 

 mark, yellow; abdomen black with the lateral margin and 

 the venter more or less yellow; legs wholly pale, rufous 

 or ochreous. Length 11 mm distincta 



°C. fascipennis (Cresson). 



°C. frontalis (Westwood). 



°C. mathematica (Kirby). Pamphilius mathematicus Kirhy. 



°C. canadensis Norton. 



°C. distincta MacGillivray. 



Caenolyda Konow. 



°C. semidea (Cresson). Lyda semidea Cresson. 



Head and thorax luteous or brownish, with the usual 

 yellow-colored spots faintly indicated; antennae luteous beyond 

 first segment ; abdomen entirely luteous or brownish ; legs luteous, 

 with the basal three-fourths of the femora rufous, fuscous, or 

 black; wings hyaline, veins luteous or brownish. Length 12 mm. 



