REHN AND HEBARD 197 



Marathon, Texas, VIII, 26 and IX, 13, 1912, (R. & H.; scarce in hifih jirecn 

 grass in wet spots), 5 d^, 3 9 . 



Boulder, Colorado, VIII, 9, 190.5, (T. A. D. Cockerel!), i d,l 9,4 juv. 9 , 

 [U. S. X. M.]. 



Sycamore Caiion, Baboquivari Mountains, Ai-izona, X, 8, 1910, c. 4700 ft., 

 (H.; common in dry grasses on canon slopes at upper forks), 21 d^, 23 9 . 



Oonocephalus hygrophilus " new species (PI. XV, fig. 9, XVI, 12; XVII, 

 11; XVIII, 21 and 22; XX, 12.) 



This insect shows nearest relationship to C. stictomerus, and 

 some affinity to C aigialus, differing from the latter species in 

 the larger size, much broader but otherwise similar vertex, deeper 

 lateral lobes of the pronotum with the ventro-caudal angle more 

 acute, not strikingly truncate distal extremity of the male abdo- 

 men, different male cerci and longer caudal femora. The male 

 cerci are distinctive, the nearest development in this respect 

 being found in C. stictomerus. 



The species probably will be found in numerous localities in 

 the heavier vegetation along the margins of salt marshes and 

 about brackish and fresh water swamps on the Gulf coast, Httle 

 work has as yet been done there in such environment. 



Type. — 9 ; Virginia Point, Galveston County, Texas. July 21, 

 1912. (Hebard.) [Hebard Collection, Type No. 172.] 



Description of Type. — Size large for the genus, form robust and rather elon- 

 gate. Head with dorsum of vertex when seen from the lateral aspect not 

 strongly but distinctly ascending above the plane of the occiput (shghtly more 

 so than in C. aigialus and much as in C. stictomerus), fastigium of vertex ahnost 

 as wide as basal antennal joint, narrowing with a distinct concavity to the facial 

 suture, when seen from front about half again as deep as wide. Eyes large for 

 the genus and unusually protruding. When seen from above the lateral lobes 

 of pronotum diverge rather strongly ventro-laterad; cephalic margin of lateral 

 lobes with the ventro-cephalic angle very weakly indicated, broadh^ arcuate 

 to the ventro-caudal angle which is very sharply rounded and weakly acute- 

 angulate, caudal margin very weakly convex to the very shallow humeral sinus, 

 convex callosity broad. Tegmina delicate in structure, elongate, reaching a 

 little beyond tips of caudal femora; wings decidedly longer, extending beyond 

 apex of ovipositor. Ovipositor decidedly shorter than caudal femur, broad, 

 approximately straight in direction but showing a very evident open-sigmoid 

 curve. Subgenital plate flat, with lateral margins convex and tiirned upward 

 sharply, thus embracing the base of the ovipositor, meso-caudal portion of 

 margin transverse. Cephalic and median limbs much as in aigialus, caudal 

 limbs decidedly longer, caudal femora with ventro-external margins armed with 

 a few small stout spines (2 and 2), genicular lobes strongly bi-spinose. 



*• From hypo, and <^tXos, a lover of the watery ways. 



TRANS. AM. ENT. SOC, XLI. 



