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



Listed as an American parasite of the cosmopolitan plant louse, 

 Aphis brassiccB. 



°P. micans Howard. Howard, Insect Book, p. 56, Fig. 29. 



Female: length 1.28 mm. ; metallic bluish, greenish or bronzy- 

 black ; antennae metallic, funicle as long as width of head, first 

 funicular joint as long as broad, not compressed, the succeeding 

 joints increasing gradually in width but not in length, to the club, 

 which is oval, compressed, and nearly as long as the three pre- 

 ceding joints combined, funicle with appressed hairs; head deli- 

 cately shagreened ; mesonotum finely punctate, not pointed, coxae 

 metallic, all femora metallic on the outside, tipped with dull 

 yellow, tibiae honey-yellow, tarsi somewhat dark, last joint brown ; 

 abdomen flat, oval, nearly as broad as thorax. Male differing 

 from the female as follows : antennae longer, pubescence of funicle 

 longer, more erect, and dirty white instead of silvery; abdomen 

 much narrower than thorax; femoral bands brown, hind tibiae 

 with a light brown central band. 



Bred from Siphonophora avence. 

 °P. altiscuta Howard. 



Body mostly shining blue, length 2 mm. ; head about one-half 

 as long as the thorax, antennae light in color and as long as 

 thorax, 13-jointed, first joint curved, as is the second, the latter 

 enlarging toward tip, third and fourth small, fifth to tenth equal 

 in size and length, last three constituting club, which tapers to 

 tip ; thorax as long as abdomen ; costal vein of front wings broken, 

 just beyond the break decidedly broader to the branch, which is 

 as long as the broad portion and knobbed; costal vein of hind 

 wings with an angle at the middle which points forward, the wings 

 very hairy except at base, where they are nearly bare, hairs at 

 margin coarser than elsewhere ; legs light in color, except femora, 

 which are dark; abdomen peduncled; female and male very- 

 similar. 



Cyrtogaster Walker. 



°C. dineutis Ashmead. 



Female: length 2.5-2.65 mm.; mostly bronze-green, conflu- 

 ently punctate; palpi fuscous, mandibles piceous or rufo-piceous, 

 scape and pedicel brownish yellow, flagel black or brown-black ; 

 head wider than thorax, a little more than three times as wide 



