7G Rev. T. A. Marshall's Monograph of 



of resemblance, which would perhaps be more difficult 

 than to point out their differences. Wesmael has indeed 

 attempted the former task, but with very indifferent 

 success. 



The characters of this division are comprised in those 

 of the single genus Pachylomma. 



PACHYLOMMA, De Brebisson. 



Paxylomma, De Breb., Enc. Meth., x, p. 23 (1825). 

 Variously spelt by authors Paxillomma, Pax7jlo7nma, 

 Paxylloma ; first corrected by Forster. 



Head 'large, transverse, wider than the thorax; eyes and ocelli 

 very large ; face narrow, somewhat concave ; clj^ieus carinated, 

 porrected above the mandibles in form of a rostrum ; palpi short,^ 

 the maxillary with 4, the labial with three joints. Antenna? ^ 9 

 13-jointed, filiform, shorter than the body in' the $, nearly as long 

 as the body in the ^ . Thorax very short and gibbous ; prothorax 

 concealed above ; mesonotum without visible furrows ; a shallow 

 fovea before the scutellum ; metathorax very short, excavated at 

 the insertion of the abdomen, which is situated at an appreciable 

 distance above the hind coxse ; sternum gibbous. Neuration of 

 wings distinct and complete ; 2 cubital areolets ; radial areolet 

 narrowly triangular, remote from the tip of the wing ; stigma 

 narrow, elongate, lanceolate, emitting the radial nervure near its 

 base ; 1st abscissa longer than the thickness of the stigma ; 2nd very 

 short, often punctiform or nullified (P. huccata) or else longer than 

 the first {P. cremieri) ; cubital nervure springing aljnormally either 

 from the point of junction of the two abscissa) {P. huccata) or from 

 the outer extremity of the 2nd (P. cremieri) ; hence the two cubital 

 areolets either touch at one point, or are separated by an isthmus ; 

 no intercubital nervures ; 1st cubital areolet confounded with the 

 Igt discoidal ; 2nd discoidal almost as large as the 1st ; anal nervure 

 not interstitial ; recurrent nervure considerably rejected ; no re- 

 current nervure in the hind wings. Four anterior legs long and 

 slender ; the hind pair very long, their coxse elongate, the tarsi 

 dilated, flattened, the 1st joint as long as, or longer than, the others 

 united. Abdomen much longer than the head and thorax, falciform, 



was a synonym of Cxnocoslius. In fact the name Pi'omachus was 

 never published, for I found it to be preoccupied, and substituted 

 another word Dolops. Dolops is widely diflerent from Caenocoslius, 

 see Tr. Ent. Soc. Lond. 1889, p. 206. the orthography of this last 

 name should be as here written, and not Cenocaelius, which is mere 

 gibberish. 



