186 GENUS STRONGYLOGASTER. 



approaches Dolerus. The species are of wide distri- 

 bution in the Palsearctic region, occurring all over 

 Europe, in Northern Siberia and Japan. Twenty species 

 are recorded by Cresson from North America. In 

 Central America both sections are not uncommon, 

 twenty-five species being known from that region. 

 Most of these are distinguished from Strongylog aster 

 proper by the eyes being larger and reaching to the 

 base of the mandibles ; the head is broad and not so 

 swollen and the clypeus is truncated at the apex. The 

 posterior metatarsus is longer than all the other joints 

 together, differing, in this respect from the old-world 

 species, which have the metatarsus shorter than the 

 other joints. The Central American species have pilose 

 antennae ; their bodies are mostly yellowish, and the 

 wings often bear fuscous stripes at the apex, base, or 

 middle, or all three. 



Synopsis of Species. 



1 (4) Lanceolate cellule with an oblique cross nervure. Pentagonal 



area indistinct ; accessory nervure in hind wings appendicu- 

 lated largely. Claws with a subapical tooth. Abdomen 

 distinctly keeled in the middle in both sexes. 



2 (3) Abdomen entirely black; tegulae and legs yellow; abdomen 



impunctate. Sharpi. 



3 (2) Abdomen banded with red ; legs for the greater part black ; 



tegulae black in , white in ; abdomen punctured. Filicis. 



4 (1) Lanceolate cellule without an oblique cross nervure; claws 



bifid. 



5 (6) Abdomen punctured ; pentagonal area indistinct ; hind femora 



and antenna? short. Body semi-opaque, covered with a close 

 griseous pile ; abdominal segments banded with yellow ; stigma 

 testaceous, black on the upper edge. Cingulatus. 



6 (5) Body smooth, shining, almost glabrous. Pentagonal* area 



distinct. Antennae and hinder femora long. 



7 (12) Thorax for the greater part black ; abdomen banded with red ; 



stigma black or fuscous black. Antennas filiform ; transverse 

 median nervure received a little in front of middle of the 

 median cellule. 



8 (11) Accessory nervure in hind wings appendiculated. Femora 



testaceous. Middle of abdomen irregularly testaceous. 

 Mouth white. 



9 (10) Legs testaceous ; hinder tibise at apex and tarsi fuscous. Vertex 



and pleurae pubescent, scarcely shining. Maculus. 



10 (9) Legs pale testaceous ; coxae and basal half of tibiae pale yellow. 



Vertex and pleurae shining, glabrous. Mixtus. 



